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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
/**
* Search Library
*
* This library handles all the searching!
*
* PHP version 5
*
* LICENSE: GNU General Public License, version 2 (GPLv2)
* Copyright (c) 2001 - 2011 Ampache.org All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License v2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* @category Search
* @package Library
* @author Karl Vollmer <vollmer@ampache.org>
* @copyright 2001 - 2011 Ampache.org
* @license http://opensource.org/licenses/gpl-2.0 GPLv2
* @version PHP 5.2
* @link http://www.ampache.org/
* @since File available since Release 1.0
*/
/**
* run_search
* this function actually runs the search, and returns an array of the results. Unlike the previous
* function it does not do the display work its self.
*/
function run_search($data) {
/* Create an array of the object we need to search on */
foreach ($data as $key=>$value) {
/* Get the first two chars to check
* and see if it's s_
*/
$prefix = substr($key,0,2);
$value = trim($value);
if ($prefix == 's_' AND strlen($value)) {
$true_name = substr($key,2,strlen($key));
$search[$true_name] = Dba::escape($value);
}
} // end foreach
/* Figure out if they want a AND based search or a OR based search */
switch($_REQUEST['operator']) {
case 'or':
$operator = 'OR';
break;
default:
$operator = 'AND';
break;
} // end switch on operator
/* Figure out what type of method they would like to use, exact or fuzzy */
switch($_REQUEST['method']) {
case 'fuzzy':
$method = "LIKE '%__%'";
break;
default:
$method = "= '__'";
break;
} // end switch on method
$limit = intval($_REQUEST['limit']);
/* Switch, and run the correct function */
switch($_REQUEST['object_type']) {
case 'artist':
case 'album':
case 'song':
$function_name = 'search_' . $_REQUEST['object_type'];
if (function_exists($function_name)) {
$results = call_user_func($function_name,$search,$operator,$method,$limit);
return $results;
}
break;
default:
$results = search_song($search,$operator,$method,$limit);
return $results;
break;
} // end switch
return array();
} // run_search
/**
* search_song
* This function deals specificly with returning song object for the run_search
* function, it assumes that our root table is songs
* @package Search
* @catagory Search
*/
function search_song($data,$operator,$method,$limit) {
/* Generate BASE SQL */
$where_sql = '';
$table_sql = '';
$group_sql = ' GROUP BY';
$select_sql = ',';
$field_sql = '';
$order_sql = '';
if ($limit > 0) {
$limit_sql = " LIMIT $limit";
}
foreach ($data as $type=>$value) {
/* Create correct Value statement based on method */
$value_string = str_replace("__",$value,$method);
switch ($type) {
case 'all':
$additional_soundex = false;
if (!(strpos($value, '-'))) // if we want a fuzzier search
$additional_soundex = true;
$where_sql = "( MATCH (`artist2`.`name`, `album2`.`name`, `song`.`title`) AGAINST ('$value' IN BOOLEAN MODE)";
if ($additional_soundex) {
$where_sql.= " OR `artist2`.`name` SOUNDS LIKE '$value'";
$where_sql.= " OR `album2`.`name` SOUNDS LIKE '$value'";
$where_sql.= " OR `song`.`title` SOUNDS LIKE '$value' ";
}
$where_sql .= ") $operator";
$table_sql = " LEFT JOIN `album` as `album2` ON `song`.`album`=`album2`.`id`";
$table_sql.= " LEFT JOIN `artist` AS `artist2` ON `song`.`artist`=`artist2`.`id`";
$order_sql = " ORDER BY";
$order_sql.= " MATCH (`artist2`.`name`) AGAINST ('$value' IN BOOLEAN MODE)";
if ($additional_soundex) $order_sql.= " + (SOUNDEX(`artist2`.`name`)=SOUNDEX('$value')) DESC,"; else $order_sql.= " DESC,";
$order_sql.= " MATCH (`album2`.`name`) AGAINST ('$value' IN BOOLEAN MODE)";
if ($additional_soundex) $order_sql.= " + (SOUNDEX(`album2`.`name`)=SOUNDEX('$value')) DESC,"; else $order_sql.= " DESC,";
$order_sql.= " MATCH (`song`.`title`) AGAINST ('$value' IN BOOLEAN MODE)";
if ($additional_soundex) $order_sql.= " + (SOUNDEX(`song`.`title`)=SOUNDEX('$value')) DESC,"; else $order_sql.= " DESC,";
$order_sql.= " `artist2`.`name`,";
$order_sql.= " `album2`.`name`,";
$order_sql.= " `song`.`track`,";
$order_sql.= " `song`.`title`";
break;
case 'title':
$where_sql .= " `song`.`title` $value_string $operator";
break;
case 'album':
$where_sql .= " `album`.`name` $value_string $operator";
$table_sql .= " LEFT JOIN `album` ON `song`.`album`=`album`.`id`";
break;
case 'artist':
$where_sql .= " `artist`.`name` $value_string $operator";
$table_sql .= " LEFT JOIN `artist` ON `song`.`artist`=`artist`.`id` ";
break;
case 'year':
if (empty($data["year2"]) && is_numeric($data["year"])) {
$where_sql .= " `song`.`year` $value_string $operator";
}
elseif (!empty($data["year"]) && is_numeric($data["year"]) && !empty($data["year2"]) && is_numeric($data["year2"])) {
$where_sql .= " (`song`.`year` BETWEEN ".$data["year"]." AND ".$data["year2"].") $operator";
}
break;
case 'time':
if (!empty($data['time2'])) {
$where_sql .= " `song`.`time` <= " . Dba::escape(intval($data['time2'])*60) . " $operator";
}
if (!empty($data['time'])) {
$where_sql .= " `song`.`time` >= " . Dba::escape(intval($data['time'])*60) . " $operator";
}
break;
case 'filename':
$where_sql .= " `song`.`file` $value_string $operator";
break;
case 'comment':
$table_sql .= ' INNER JOIN `song_data` ON `song`.`id`=`song_data`.`song_id`';
$where_sql .= " `song_data`.`comment` $value_string $operator";
break;
case 'played':
/* This is a 0/1 value so bool it */
$value = make_bool($value);
$where_sql .= " `song`.`played` = '$value' $operator";
break;
case 'minbitrate':
$value = intval($value);
$where_sql .= " `song`.`bitrate` >= ('$value'*1000) $operator";
break;
case 'rating':
$value = intval($value);
$userid = $GLOBALS['user']->id;
$rcomparison = '>=';
if ($_REQUEST['s_rating_operator'] == '1') {
$rcomparison = '<=';
}
elseif ($_REQUEST['s_rating_operator'] == '2') {
$rcomparison = '<=>';
}
// Complex SQL follows
// We do a join on ratings from the table with a
// preference for our own and fall back to the
// FLOORed average of everyone's rating if it's
// a song we haven't rated.
if ($operator == 'AND') {
$table_sql .= ' INNER JOIN';
}
else {
$table_sql .= ' LEFT JOIN';
}
$table_sql .= " (SELECT `object_id`, `rating` FROM `rating` WHERE `object_type`='song' AND `user`='$userid'
UNION
SELECT `object_id`, FLOOR(AVG(`rating`)) AS 'rating' FROM `rating`
WHERE `object_type`='song' AND
`object_id` NOT IN (SELECT `object_id` FROM `rating` WHERE `object_type`='song' AND `user`='$userid')
GROUP BY `object_id`
) AS realrating ON `song`.`id` = `realrating`.`object_id`";
$where_sql .= " `realrating`.`rating` $rcomparison '$value' $operator";
break;
case 'tag':
// Fill it with one value to prevent sql error on no results
$ids = array('0');
$tag_sql = "SELECT `object_id` FROM `tag` LEFT JOIN `tag_map` ON `tag`.`id`=`tag_map`.`tag_id` " .
"WHERE `tag_map`.`object_type`='song' AND `tag`.`name` $value_string ";
$db_results = Dba::read($tag_sql);
while ($row = Dba::fetch_assoc($db_results)) {
$ids[] = $row['object_id'];
}
$where_sql = " `song`.`id` IN (" . implode(',',$ids) . ") $operator";
break;
default:
// Notzing!
break;
} // end switch on type
} // foreach data
/* Trim off the extra $method's and ,'s then combine the sucka! */
$where_sql = rtrim($where_sql,$operator);
$group_sql = rtrim($group_sql,',');
$select_sql = rtrim($select_sql,',');
if ($group_sql == ' GROUP BY') { $group_sql = ''; }
$base_sql = "SELECT DISTINCT(`song`.`id`) $field_sql $select_sql FROM `song`";
$sql = $base_sql . $table_sql . " WHERE " . $where_sql . $group_sql . $order_sql . $limit_sql;
/**
* Because we might need this for Dynamic Playlist Action
* but we don't trust users to provide this store it in the
* session where they can't get to it!
*/
$_SESSION['userdata']['stored_search'] = $sql;
$db_results = Dba::read($sql);
$results = array();
while ($row = Dba::fetch_assoc($db_results)) {
$results[] = $row['id'];
}
return $results;
} // search_songs
?>
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